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English 
Super elastic nickel-titanium (NiTi) alloys can tolerate large deformations due to a stress-induced martensitic transformation. When NiTi wire is stretched, a propagating macroscopic transformation front moves along the wire, separating transformed and untransformed regions, unlike other materials which deform homogenously. 3D-XRD stress tomography provided scientists with stress and strain tensors in austenite grains near this propagating front, and they could reconstruct a complete 3D picture of the front using digital image correlation and finite element modelling.